According to a study tracking more than 13,000 community-dwelling older adults in Taiwan, physical fitness assessments such as the 8-foot up-and-go test can indicate a person’s mortality risk over a seven-year period. Researchers found that participants who performed best on standardized fitness evaluations were about half as likely to die during the follow-up period compared to those with the lowest scores.
How Simple At-Home Balance Tests Reveal Aging and Longevity Risks
Physical fitness reflects how multiple body systems work together, as explained to Everyday Health by Dr. Li-Lin Liang, study co-author and a researcher at the Institute of Public Health within the College of Medicine at the National Yang Ming Chiao Tung University. The research evaluated adults ages 65 and older, consisting of approximately 62.5% women, to determine how physical capability correlates with life expectancy.
During an average follow-up period of seven years, 1,631 participants—about 12% of the group—died. When researchers compared the scores, the fittest participants demonstrated a mortality risk roughly half that of the lowest performers. This calculation factored in adjustments for age, sex, body weight, and preexisting health conditions.
The 8-Foot Up-and-Go Test and Mortality Risk
Not all physical evaluations carried equal weight in predicting outcomes. The strongest predictor identified in the study was the 8-foot up-and-go assessment, which measures balance and agility. Participants in this test started from a seated position, stood up, walked eight feet around a cone, returned to the chair, and sat back down.
Individuals who scored highest on the 8-foot up-and-go test experienced a 59% lower mortality risk than those who scored lowest. Another straightforward balance evaluation required participants to stand on one leg with their eyes open for up to 30 seconds. Top scorers on the one-leg balance test faced about half the mortality risk of those at the bottom.
Pro Tip: Simple assessments like standing on one leg or performing the 8-foot up-and-go test can provide a practical snapshot of functional health. Healthcare providers suggest incorporating these movements into routine checkups to spot physical decline early.
Strength and Endurance Metrics for Older Adults
In addition to balance evaluation, investigators measured lower-body strength by noting the total repetitions participants could perform of rising from a chair and sitting back down during a 30-second window while keeping their arms folded across their chests. Participants who managed the highest number of chair stands recorded a 45% lower mortality risk than those who completed the fewest.
Heart and lung endurance was measured using a two-minute step test, where participants repeatedly lifted their knees to a set height. Better scores on this cardiovascular endurance test correlated with a 58% lower mortality risk.
Flexibility tests, including a back-scratch test and a chair sit-and-reach test, showed that while extreme stiffness associated with higher mortality, increasing flexibility beyond a moderate functional range did not provide additional longevity benefits.
Sex Differences in Longevity Predictors
When all physical evaluation metrics were combined by the research team, individuals falling into the upper 20% of scores exhibited a reduction in mortality risk of roughly 61% relative to those situated in the lowest 20%. However, specific fitness factors carried varying weight depending on biological sex.
For male participants, agility and balance demonstrated the most substantial correlation with decreased mortality rates, closely followed by cardiovascular endurance. Among women, lower-body strength mattered about as much as balance and agility. Researchers suggested this difference relates to the higher prevalence of osteoporosis among older women, a condition that weakens bones and highlights the necessity of maintaining leg strength and mobility.
Did You Know? More than one in four adults ages 65 and older falls each year in the United States, making falls the leading cause of fatal and nonfatal injuries among older populations.
Frequently Asked Questions
What is the 8-foot up-and-go test?
The 8-foot up-and-go test measures balance and agility by having a participant stand up from a chair, walk eight feet around a cone, return to the chair, and sit back down.
How does balance relate to aging and mortality?
According to researchers, physical fitness metrics like balance reflect physiological reserve, capturing the cumulative effects of habitual activity, illness, and biological aging.
Why is lower-body strength particularly important for women as they age?
Researchers noted that lower-body strength matters greatly for women, potentially due to the higher prevalence of osteoporosis, which weakens bones and increases the risk of fractures from falls.
Can doctors use these fitness tests during routine checkups?
Study authors suggest that incorporating simple fitness assessments into routine medical visits can help healthcare providers identify individuals at greater risk of physical decline earlier.
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